Apparatus for making memory storage matrices

ABSTRACT

An apparatus for making memory storage matrices comprises Y coordinate drive wires strung through cores, wire fastening assemblies, a threading member for threading matrices with X coordinate drive wires, a threading mechanism for wiring a digit winding through the matrix cores, which includes a movable positioning mechanism connected with threaded bushings and disposed at an angle to the X wires, and tension devices with clamps, the positioning mechanism being made as a moving roll split into sections with handles having one longitudinal slot and grooves receiving the Y wires, the grooves for the Y wires being in the form of a spiral. The positioning mechanism can also be a vertically movable support positioned at an angle to the X wires and fitted with a means for forcing the Y-wire bundles closer together, comprising two members moving towards each other having teeth secured thereupon. The means for forcing the Y-wire bundles closer together may also be made as tension springs disposed against each Y-wire bundle.

Burkin et ai.

[Ill 3,831,253 Aug. 27, 1974 APPARATUS FOR MAKHNG MEMORY STORAGEMATRICES Inventors: ,iury Alexandrovich Burkin,

Tsvetnoi proezd, 29, kv. 24; Jury Emelyanovicii Seleznev, Vesenny proezd4a, k.v. 16, both of Novosibirsk, U.S.S.R.

Filed: June 15, 1973 Appl. No.: 370,468

Foreign Application Priority Data Apr. 27, 1972 U.S.S.R 1776225 June 16,I972 U.S.S.R 1797282 US. Cl. 29/203 MM lint. Ci. HOSk 13/04 Field ofSearch 29/203 MM, 203 B, 203 R,

29/203 DT, 203 D References Cited UNITED STATES PATENTS 9/1967 Der Voo29/203 MM l/l97l Lima et a1 29/203 MM Primary Examiner-Thomas H. EagerAttorney, Agent, or Firm-l-iolman 8L Stern [57] ABSTRACT An apparatusfor making memory storage matrices comprises Y coordinate drive wiresstrung through cores, wire fastening assemblies, .a threading member forthreading matrices with X coordinate drive wires, a threading mechanismfor wiring a digit winding through the matrix cores, which includes amovable positioning mechanism connected with threaded bushings anddisposed at an angle to the X wires, and tension devices with clamps,the positioning mechanism being made as a moving roll split intosections with handles having one longitudinal slot and grooves receivingthe Y wires, the grooves for the Y wires being in the form of a spiral.The positioning mechanism can also be a vertically movable supportpositioned at an angle to the X wires and fitted with a means forforcing the Y-wire bundles closer together, comprising two membersmoving towards each other having teeth secured thereupon. The means forforcing the Y-wire bundles closer together may also be made as tensionsprings disposed against each Y-wire bundle.

9 Claims, 7 Drawing Figures mmsa PAIENIEUAUGZHQN WEEK 3 EFF PAIENIEAUEZYISM WEE? M W 6 APPARATUS FOR MAKING MEMORY STORAGE MATRICESBACKGROUND OF THE INVENTION This invention relates generally to thewiring of apertured cores used in ferrite core matrices and memory cubesusing the third conductor, a digit winding for electronic computers, andmore particularly it relates to apparatus for making memory storagematrices The invention can be used for wiring any matrices of anystorage capacity assembled from cores of any size, includingsuperminiature cores, by conductors of any diameter, includingmicrowire. The invention is suitable for making memory matrices andunits with any arrangement of cores at the intersections of horizontaland vertical lines and permits of wiring a digit winding practically forall known topological patterns of matrices, except for a diagonaltopology. The invention is also applicable to threading matrices inwhich drive windings are made up of two or more turns.

Devices for making memory storage matrices are known which mechanize andautomate the threading operation.

One known device comprises Y wires threaded through piles of ferritecores secured in a row to a frame, an aligning element having alongitudinal guide for gripping the cores in succession and arrangingthem in a row, with a string of ferrite cores curving about the aligningelement on one side so that the cores are spaced at regular intervalsequal to the lead of the threading spiral, a coiling mechanism with adrive mounted on the butt end of the aligning element, a coiling wirefor threading the matrix along the X axis spirally with a lead equal tothe distance between the centers of the cores aligned on the aligningelement, and an auxiliary roller contacting the wire spiral disposedparallel to the aligning element, the roller being connected to thecoiling mechanism drive so that it rotates in a sense opposite to thedirection of wire coiling.

The aligning element of this device can be made in the form of a rollwith grooves cut therein at a spacing equal to the lead of the threadingspiral, while the longitudinal guides for gripping the cores aredisposed on the projections and in the recesses ofthe grooves so thatthe cores are arranged in two parallel lines at a spacing correspondingto the diameter of the threading spiral.

For threading the digit winding directly by a wire coiled into a spiraland for enabling the passage of this winding between the strings ofcores, the aligning element of the device can be divided into sections,each having at least two longitudinal guides for gripping the cores andfitted with an individual drive for moving the sections to align thelongitudinal guides of different sections.

This known device fails to thread the digit winding by a continuous wirereturning from one row to another inside the matrix. Anotherdisadvantage of this device is that the Y wires cannot be arranged in amatrix with spacings other than those of the cores on the aligningelement. This disadvantage is particularly important when it isnecessary to space the cores in a matrix at intervals less than the corediameter which is typical of modern computers.

Another known device for matrix wiring comprises a special mask which isan apertured sheet with the shape and size of the apertures repeatingthe shape and size of the cores. The apertures are locatedat placescorre sponding to cores in the matrix and turned through precisely 45towards its rows and lines in conformity with the matrix circuitry. Oneside of the mask has an adhesive coating so that each aperture becomes acell with an adhesive-coated bottom for a core. The device also includesan electromagnetic shaking jig. The cores in the mask are threaded byhollow needles with Wires passing inside the needles.

This device has the following disadvantages: the masks and hollowneedles are expensive elements calling for high precision in theirmanufacture. The apertures of the masks which are very difficult inmanufacture for the smallest size of cores are not completely filledwith cores on a shaking jig. Manual placing of cores into missed cellsof the mask appreciably reduces the efficiency of the operation andcauses damage both to the mask and to the adjacent cores. Hollow needlesfor small cores, for instance 0.3x .l7x0.06 mm in size, threaded withonly two coordinate, wires, must have an outer diameter of about microns(taking into account the angular position of the core and the aperturespace filled by the first wire), while the inner diameter of the needlemust be such as to enable insertion through the needle of a wire atleast 40 microns in diameter, which is practically next to impossibleand with long wires quite unfeasible.

Removal of the adhesive coating and then the entire mask from thethreaded matrix also results in damage to the cores, thus reducing theoutput considerably.

Wiring of a digit winding requires great concentration on the part ofthe worker and exerts heavy strain on the workers eyes.

The device can be used for making without soldering only matrices ofvery small storage capacity and is quite unsuitable for threading threewires through superminiature cores with an outer diameter of 0.4 mm orless.

At present, even where threading of Y and X wires is mechanized by somemeans, threading of ferrite matrices by a digit winding remains a manualoperation, which is rendered still more difficult due to the fact thatthe cores to be threaded are disposed at 45 to the threading wire, whichreduces the free space in the core aperture for insertion of the digitconductor approximately five times as compared with what can beachieved.

SUMMARY OF THE INVENTION An object of the present invention is toprovide an apparatus for making memory storage matrices with a digitwinding or with drive windings made up of two or a plurality of turnswhich will be simple and reliable in operation and which will minimizestrain on the operators eyes when threading ferrite core matrices oflarge storage capacity and matrices composed of superminiature cores byeliminating soldered connections in a matrix.

The essence of the invention resides in that an apparatus for wiringmemory storage matrices comprising Y coordinate wires strung throughoores, wire fastening assemblies and a threading member for wiring thematrix by X coordinate conductors, which has, according to theinvention, a threading mechanism for wiring a digit winding, including amovable positioning mechanism afiixed to a frame and disposed in directproximity and transversely to the Y wires, and tension devices withclamps for fixing at least one X wire.

The positioning mechanism of the proposed apparatus can be made in theform of a moving roll with at least one longitudinal slot; the movingroll may also have grooves for the Y wires disposed along the roll inaccordance with the arrangement of the Y wires in the matrix beingwired.

The moving roll can be split into sections corresponding to places wherethe digit conductor passes over from one X wire to another inside thematrix, the sections being'provided with handles for turning thesesections as required.

The positioning mechanism can be set at an angle to the X wires equal tothe minimum angle at which the core can be disposed relative to the wirethreading this core, the grooves for the Y wires being made as an atleast one-coil spiral with a helix angle corresponding to the angle ofthe positioning mechanism, the positioning mechanism being connected tothreaded bushings.

The positioning mechanism can also take the form of a vertically movablesupport provided with means for forcing the Y wires closer together,wherein the means for forcing the Y wires closer together can comprisetwo members moving towards each other and affixed to the verticallymovable support, with teeth interspaced between the Y-wire bundles, theteeth of one member being disposed on one side of each Y-wire bundle,and the teeth of the other member being disposed on the other side ofthese bundles.

The means for forcing the Y wires closer together can also be made astension springs disposed against each Y-wire bundle and having aplurality of turns equal to the number of the Y wires in the bundle, thespring ends being rigidly secured to the members moving towards eachother at the edges of the wire bundles, one end of each spring beingaffixed to one member and the other end being affixed to the othermember.

The vertically movable support can be positioned at an angle to the Xwires in the matrix, the angle being equal to the minimum possible angleat which the core can be set relative to the wire threading this core.

The proposed apparatus simplifies the process of making memory storagematrices with digit windings, is suitable for wiring the second turn ofthe winding in threading matrices with two-turn coordinate windings, canbe used for threading toroidal ferrite cores of any size arranged in anymatrix formation by wires of any diameter, and makes it possible to wiredigit windings in practically all known topological patterns, except fordiagonal topology.

BRIEF DESCRIPTION OF THE DRAWINGS The invention can be more fullyunderstood from the following detailed description of preferredembodiments thereof when read with reference to the accompanying drawingwherein:

FIG. 1 is a diagrammatic view of an apparatus for threading digit wiresthrough matrix cores, according to the present invention;

FIG. 2 is a diagrammatic view of an apparatus with a moving roll,according to the present invention;

FIG. 3 is a diagrammatic view of an apparatus in which the moving rollis positioned at an angle to the wires and provided with guide grooves,according to the present invention;

FIG. 4 is a diagrammatic representation of an apparatus with avertically movable support, according to the present invention;

FIG. 5 is a diagrammatic representation of an apparatus with a means forforcing the wires closer together made in the form of springs, accordingto the present invention;

FIG. 6 illustrates a core set at a minimum possible angle to the wire;and

FIG. 7 is a diagrammatic fragmentary view illustrating a matrix withcomplex row-to-row turns, according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The proposed apparatusfor making memory storage matrices comprises Y coordinate wires I(FIG. 1) preliminarily threaded through cores 2, wire fasteningassemblies 3 to which the wires are fastened with a small tension, and athreading member 4 for weaving the matrices 5 with X coordinate wires 6.

The apparatus also comprises a threading mechanism 7 for threading thecores 2 with a wire 8 used for making a digit winding 9 of the matrix 5.The threading mechanism 7 is positioned between the threading member 4for weaving the matrices 5 with the X wires 6, and the matrix 5 beingwired, and consists of a movable positioning mechanism 10 secured on aframe 1 1, and two tension devices I2 for applying tension to the Xwires 6 with clamps 13 disposed at the ends of the same frame 11 forclamping the X wires 6.

The movable positioning mechanism 10 is disposed across the Y wires 1 onone side of these wires (preferably under the wires) and in directproximity to the Y wires 1.

The tension devices 12 are made, for example, from rubber with clamps 13in the form of a wire gripping notch on the rubber and are located alongthe axis of the movable positioning mechanism 10 in proximity to theplane of the Y wires 1.

The positioning mechanism 10 can be made as a moving roll I4 (FIG. 2)having at least one longitudinal slot 15 for the cores 2 threaded withthe Y wires 1 and X wires 6.

The moving roll 14 can have grooves 16 (FIG. 3) for the Y wires I,provided on its surface and arranged along the roll 14 in the samepattern as that of the Y wires 1 in the matrix 5 being wired, i.e., atpreset spacings both between the bundles 17 of the Y wires 1 and betweenindividual wires inside each bundle 17.

When the matrices 5 are made with the digit conductor 9 passing from oneX wire 6 to another X wire 6 inside the matrix 5 (row-to-row turns 18),the moving roll 14 can be split into sections I9, 20, 21, the boundariesbetween the sections coinciding with the places at which the conductors9 passes from one wire to another (row-to-row turns 18). In this case,the sections 19, 20, 21 are provided with handles 22 for turning eachsection 19, 20, 21.

In the above embodiment of the invention, the positioning mechanism 10(FIG. 1) is disposed at an angle 23 (FIG. 3) to the X wires 6 in thematrix 5, the angle 23 selected such as to be close as possible to theminimum possible angle at which the core can be positioned relative tothe wire threading this core. The value of the angle 23 depends on thediameter of the Y wire a, the

inner diameter of the core 2 and the thickness (axial size) of the core2.

In this embodiment, when the positioning mechanism is made in the formof a moving roll 14, the grooves 16 are helical-shaped (a multiple helixconfiguration is also possible) with the helix angle corresponding tothe angle of the moving roll 14, which roll is in this case mounted inthreaded bushings 24 with a mating thread.

In another embodiment of the threading mechanism 7 for threading thecores 2 with the wire 8 of the digit winding 9, the positioningmechanism 10 (FIG. 1) is a vertically movable support 25 (FIG. 4)assembled to the frame 11. The support 25 is a flat sheet disposed nearthe Y wires 1 without touching these wires and provided with a means forforcing the bundles 17 of the Y wires 1 closer together.

The means for forcing together the wire bundles 17 may comprise twomembers 26 and 27 moving towards each other which are affixed to thesupport 25 and disposed across the Y wires 1 with teeth 28 located onthe sides of the wire bundles 17. The teeth 28 are disposed on themembers 26, 27 so that on the member 26 they are secured on one side ofeach bundle 17 of the Y wires 1, and on the member 27 so that they comefrom the other side. The height of the teeth 28 must be less than theheight of vertical movement of the support 25.

In still another embodiment, the means for forcing V i together the wirebundles 17 can be tension springs 29 (FIG. 5), one spring for each wirebundle 17, attached with their ends 30. to members 26 and 27 movingtowards each other, similar to those in the above embodiment. The numberof coils in each spring 29 must be equal to the number of Y wires 1 inthe wire bundles 17. The middle coils of the springs 29 are locatedagainst the middle of each wire bundle 17, and all the ends 30 of thesprings 29 positioned on one side of the wire bundles 17 are rigidlyattached to one member 26, while all the other ends 30 are rigidlysecured on the other member 27.

The diameter of the springs 29 must be less than the height of thevertical travel of the support 25 so as not to obstruct the movement ofthe cores 2 threaded by the X wire 6 along the Y wires 1.

In all the embodiments of the positioning mechanism 10 (FIG. 1) with thevertically movable support 25, the mechanism 10 can be set at the angle23 (FIG. 6) to the Y wires 1, the angle 23 being equal to the minimumangle at which the core 2 can be set relative to the wire threading thecore 2.

Now the operating principle of the apparatus for making memory storagematrices or memory units employing the third wire, a digit conductor,for threading through the matrix cores will be considered.

Prior to the wiring operation, the ferrite cores 2 are strung on each ofthe Y wires 1 (FIG. 1) in a number sufficient for the entire matrix ormemory unit. and then the Y wires 1 are arranged on the apparatus andclamped in the fastening assemblies 3 with a slight tension. A wire isinserted into the X wire threading member 4.

Then, the X wire 6 is threaded through the outside core 2 on each Y wire1, the threaded cores 2 are shifted together with the X wire 6 along thestrung Y wires 1 and positioned in the vicinity of the moving roll 14(FIG. 2) parallel to the roll, where upon the ends of the X wires 6 aresecured in the clamps 12 of the tension devices 13.

In this way at least one X wire 6 threaded through the cores 2 isprepared to be threaded with the digit winding 9.

For wiring the digit winding 9 in the matrix 5 with the row-to-row turns18, only one row of the threaded cores 2 is brought in this position.The circuits of the matrices 5, however, (FIG. 7) may need morecomplicated row-to-row turns 18 involving a larger number of the X wires6, for which purpose a required number of the X wires 6 threaded throughthe cores 2 are shifted close to the moving roll 14 (FIG. 2).

Then, by rotating the roll 14 the slot 15 of the roll 14 is so adjustedthat it faces the wires 6 with the cores and the cores 2 can freelyenter the slot 15. The roll 14 is fixed in this position to prevent itsrotation and moved along the Y wires 1 towards the threaded cores 2until the threaded cores 2 set as required are engaged in the slot 15,Then the roll 14, still moved in the same direction, is released forrotation and the roll 14 rolls over the Y wires 1 and closes the circuitof the X wires 6 with the threaded cores 2 in the slot 15.

The slot 15 raises the cores 2 above the Y wires 1 and the X wires 6allowing thereby easy translation of the conductor 8 of the digitwinding 9 on one side of the X wires 6 and Y wires 1 passed through theapertures in the cores 2.

After that, two sections of the wire 8 (FIG. 3) are taken, the length ofthe wires being sufficient for wiring both digit windings 9 in thematrix 5, and the cores 2 engaged in the slot 15 are threaded with thesewires starting from the center of the roll 14.

One of the two wires 8 is drawn. through the cores 2 strung on onemiddle bundle 17 of the Y wires 1, and the other wire 8, through thecores 2 of the other middle bundle 17 of these wires. The threadingoperation must proceed from the center of the roll 14 towards its ends,the cores 2 of one X wire 6 being threaded with one end of the wire 8,and the cores 2 of the adjacent wire with the other end of the same wire8. After that, the cores 2 of the outside wire bundles 17 are thread bythe transposed wires 8, that is, the end of the wire 8 which has beenpreviously used for threading the cores 2 strung on one X wire 6 in themiddle bundle 17 is now employed to thread the cores 2 of the adjacent Xwire 6 in the outside wire bundles 17.

The roll 14 is shifted along the Y wires 1 towards the threading member4 for threading the X wires 6 and both X wires 6 with the cores 2threaded with the Y wires 1, X wires 6 and the wires 8 will be on theside of the matrix 5. The cores with all the wires (Y wires 1, X wires 6and wires 8) passed through them are translated along the Y wires 1 andset into position in the matrix 5. The wires 8 of the digit winding 9are pulled up from the center of the matrix 5 sidewards and threading ofthe next row of the cores 2 begins.

The cores 2 are threaded with the next two X wires 6, and the digitwinding 9 is wired through the cores 2 by the ends of the same wires 8in the same manner with the only difference being that the wires 8 arenow threaded starting from the ends of the roll 14 towards its center.Thus, the digit winding is wired through the cores 2 of four pairs ofthe X wires 6, each odd pair being threaded with the digit winding 9from the center of the matrix 5 sidewards, and each even pair, from thesides towards the center of the matrix. The cores 2 of the fifth pair ofthe X wires 6 are threaded with the wires 8 of the digit winding 9 aftertransposing the ends of the wires 8 so that the digit windings 9 of theright and left sides of the matrix change places.

Further threading is carried out as described above.

When using the moving roll M with the grooves 116 for accepting the Ywires 1, a preliminary operation before threading consists in laying theY wires ll into the grooves 16 in line with the wire bundles 117 in thematrix 5. The Y wires ll between the threading member 4; and the roll 14may not run parallel to each other, however, in the zone of the matrix5, the Y wires l remain parallel, thus permitting proper accomplishmentof all the curves of the digit winding 9.

If use made of the moving roll 14 divided into the sections 19, 20, 21and provided with the handles 22, first the slot 15 is aligned by thehandle 22 so as to form one straight line in all the sections 19, and21. Then, the roll 14 is handled in manner similar to that of the rollwithout sections described above with the only difference being thatbefore threading the cores 2 with the wires 8, one X wire 6 in theoutside sections 19 and 21 is aligned by means of the handle 22 with theother X wire 6 in the middle section 20, and then vice versa, i.e., theother X wire 6 in the sections 19 and 21 is aligned with the first Xwire 6 of the section 20. The wire 8 is threaded through the cores 2arranged in one straight line in two wire bundles 17 at a time.

When the positioning mechanism 10 is set at the angle 23 to the X wires6 in the matrix 5 and when the helical grooves 16 in the positioningmechanism and the threaded bushings 24 are used, the cores 2 aredisposed normal to the X wire 6 in the slot 15. This provides for amaximum free space in the apertures of the cores 2 for the threadingwire 8.

When using the positioning mechanism 10 made as the vertically movablesupport 25 (FIG. 4) having the means for forcing the bundles 17 of the Ywires 1 closer together, before threading the wire 80f the digit winding9 through the cores 2, the cores 2 are pushed against the adjacent Ywires 1, and turned through a maximum possible angle to the Y wires 1where on they are strung so as to form a short tube composed of therigidly fastened cores 2.

For advancing the threaded cores 2, the support 25 is lowered.

When the means for forcing the bundles l7 of the Y wires 1 closertogether comprises the members 26, 27 moving towards each other, thecores 2 are pressed by the teeth under the action of the outside Y wires1 in the bundles 17 moving in side these bundles 17.

The compressive force is transmitted to the central Y wires 1 in thewire bundles 17 directly through the cores 2 arranged in the slot 15.

If the means for forcing the wires closer together is made in the formof the tension springs 30 (FIG. 5) with the ends 31 secured on themembers 26 and 27 moving towards each other, the internally locatedcores 2 in the bundles 17 of the Y wires 1 are forced together by themiddle coils of the spring 30. r

The use of the vertically movable support 25 set at the angle 23 to theX wires 6 in the matrix 5 provides optimum conditions for thetranslation of the threading wire 8 through the apertures of the cores2, which, together with a decrease in the length of the threaded bundlesl7, simplifies threading of the digit winding 9.

In all the embodiments of the invention, the sequence of operations inthreading the digit windings 9, i.e., passing of the threading wires 8through the cores 2 of the matrix 5, remains as stated above.

The proposed apparatus minimizes strain on the operators eyes in makingmemory storage matrices, improves the quality of the matrices, is easyin manufacture and reliable in service.

What is claimed is:

H. An apparatus for making memory storage matrices, comprising: aplurality of cores; Y coordinate wires threaded through said cores; wirefastening assemblies for said Y coordinate wires; X coordinate wires; athreading member for threading said matrices with said X coordinatewire; digit winding wires; and a threading mechanism for threading saiddigit winding wires through said cores of said matrices, said threadingmechanism comprising a frame, a movable positioning mechanism mounted onsaid frame and disposed in direct proximity and transversely to said Ycoordinate wires, and tension devices having clamps for fixing at leastone of said X coordinate wires.

2. An apparatus as claimed in claim 1, wherein said movable positioningmechanism comprises a moving roll having at least one longitudinal slot.

3. An apparatus as claimed in claim 2, wherein said moving roll hasgrooves for said Y coordinate wires, said Y coordinate wires beingarranged in bundles with sides, said bundles being positioned along saidmoving roll in accordance with the arrangement of said bundles of said Ycoordinate wires in said matrix being wired.

4. An apparatus as claimed in claim 2, wherein said matrix is madehaving row-to-row turns of said digit winding as it curves from one saidX coordinate wire to another, said moving roll being split into sectionscorresponding to said row-to-row turns of said digit winding betweensaid X coordinate wires inside said matrix, said sections being providedwith handles for their rotatron.

5. An apparatus as claimed in claim 4, further including threadedbushings, said movable positioning mechanism being connected to saidbushings and disposed at an angle to said X coordinate wires in saidmatrix, said angle being equal to the minimum angle at which said corecan be set with respect to said Y coordinate wire threaded through saidcore, said grooves for gripping said Y coordinate wires being made inthe form of an at least one-coil helix with the helix angle being equalto said angle of said positioning mechanism.

6. An apparatus as claimed in claim 1, wherein said positioningmechanism comprises a vertically movable support having means forforcing bundles of said Y coordinate wires closer together.

7. An apparatus as claimed in claim 6, wherein said means for forcingsaid bundles of said Y coordinate wires closer together comprises twomembers moving towards each other and secured to said vertically movablesupport, said two members moving towards each other having teethinterspaced between said bundles of said Y coordinate wires, said teethon one of said two members being disposed on one side of each saidbundle of said Y coordinate wires, and said teeth on the other of saidtwo members being disposed on the other side of said bundles.

to one of said two members, and the other end being affixed to othersaid two members.

9. An apparatus as claimed in claim 6, wherein said vertically movablesupport is disposed at an angle to said X coordinate Wires in saidmatrix, said angle corresponding to the minimum angle at which said corecan be set with respect to said Y coordinate wire threaded

1. An apparatus for making memory storage matrices, comprising: aplurality of cores; Y coordinate wires threaded through said cores; wirefastening assemblies for said Y coordinate wires; X coordinate wires; athreading member for threading said matrices with said X coordinatewire; digit winding wires; and a threading mechanism for threading saiddigit winding wires through said cores of said matrices, said threadingmechanism comprising a frame, a movable positioning mechanism mounted onsaid frame and disposed in direct proximity and transversely to said Ycoordinate wires, and tension devices having clamps for fixing at leastone of said X coordinate wires.
 2. An apparatus as claimed in claim 1,wherein said movable positioning mechanism comprises a moving rollhaving at least one longitudinal slot.
 3. An apparatus as claimed inclaim 2, wherein said moving roll has grooves for said Y coordinatewires, said Y coordinate wires being arranged in bundles with sides,said bundles being positioned along said moving roll in accordance withthe arrangement of said bundles of said Y coordinate wires in saidmatrix being wired.
 4. An apparatus as claimed in claim 2, wherein saidmatrix is made having row-to-row turns of said digit winding as itcurves from one said X coordinate wire to another, said moving rollbeing split into sections corresponding to said row-to-row turns of saiddigit winding between said X coordinate wires inside said matrix, saidsections being provided with handles for their rotation.
 5. An apparatusas claimed in claim 4, further including threaded bushings, said movablepositioning mechanism being connected to said bushings and disposed atan angle to said X coordinate wires in said matrix, said angle beingequal to the minimum angle at which said core can be set with respect tosaid Y coordinate wire threaded through said core, said grooves forgripping said Y coordinate wires being made in the form of an at leastone-coil helix with the helix angle being equal to said angle of saidpositioning mechanism.
 6. An apparatus as claimed in claim 1, whereinsaid positioning mechanism comprises a vertically movable support havingmeans for forcing bundles of said Y coordinate wires closer together. 7.An apparatus as claimed in claim 6, wherein said means for forcing saidbundles of said Y coordinate wires closer together comprises two membersmoving towards each other and secured to said vertically movablesupport, said two members moving towards each other having teethinterspaced between said bundles of said Y coordinate wires, said teethon one of said two members being disposed on one side of each saidbundle of said Y coordinate wires, and said teeth on the other of saidtwo members being disposed on the other side of said bundles.
 8. Anapparatus as claimed in claim 6, wherein said means for forcing saidbundles of said Y coordinate wires closer together comprises back-movingsprings having ends, said springs being disposed against said bundles ofsaid Y coordinate wires and having plurality of turns equal to thenumber of said Y coordinate wires in said bundles of said Y coordinatewires, said ends of said springs being rigidly connected to said membersmoving towards each other along the edges of said bundles, one of saidends of each said spring being affixed to one of said two members, andthe other end being affixed to other said two members.
 9. An apparatusas claimed in claim 6, wherein said vertically movable support isdisposed at an angle to said X coordinate wires in said matrix, saidangle corresponding to the minimum angle at which said core can be setwith respect to said Y coordinate wire threaded through said core.